Process for the treatment of diagonal thread fabric webs



E. MAYER March 15, 1960 PROCESS FOR THE TREATMENT OF DIAGONAL THREAD FABRIC WEBS Filed Sept. 25, 1956 G30 000 n n nn0u0n0 0 0 0 0 030000000 "0000 030" 0 0 0 0 0 0 N "WNW" aauuunnfluu 0N3 0n0n0u u 0000000n0N0 00000 0000000 0 0 0 0 0 0 00 00 0 00 0 0 000000 000 K 0 00 0 0 0 000n0n0n000 I 0000 0 0 0 O O 00? 00000900 00 0 0 0 0000000000 000 0 0 0 0 0 0 0 0 0 0 000 00000 0000 000 00000 0 0 0 0 00 0000000000 0000 u0u0u00 0 0 0 00 0 0 n n 0 0 0000000000 0n0n0 0 0 000000000 000.0 00 00" 0 00 0 0 0 0 00 0 0 0 00 000000 00 900000 000000000 0 0 0u v0 00 00000000 0 0000 0000 0 00.0 0000 0 0 0 00 0 0000 0 0 00 0 0000 0 0 0 0 0 0 00000 0 0 0 0 0 00000000 0 0000000 0 0 0n0 X 0 000n000 00000000 00n0 0 0000u00 0 0 0 0 0 0 0 00000000 000 0 0 00000000 00n u u n 0 0 000000000 0 0 0N w 0 0u0n0n0u0 0u0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 INVENTOR. fR/VS T MA me March 15, 1960 E. MAYER 2,928,160

"PROCESS FOR THE TREATMENT OF DIAGONAL THREAD FABRIC WEBS Filed Sept. 25, 1956 2 meets-Sheet 2 IN V EN TOR. tie/vs T MflYEB k W 1/ J67 PROCESSI OR THE TREATMENT OF DIAGONAL THREAD FABRIC WEBS I Ernst Mayer, Weissenau, Wurttemberg, Germany Application September 25, 1956, Serial No. 611,910

3 Claims. (Cl. 2$'-72) This application is a continuation-in-part of application Serial No. 242,963, filed August 21, 1951 and now abandoned.

The invention relates to a process for the treatment of diagonal thread fabric webs. In diagonal-thread fabric webs, which are generally obtained by helically cutting a fabric hose or tube, the thread angle is of importance for the purpose for which it is to be used, the thread anglebeing the angle which is formed with the direction of travel of the fabric web during its preparation.

Processes have already been developed which have for their object, either to prevent an alteration of the thread angle during the treatment of the fabric web, or to alter the thread angle which has resulted with the cutting of the fabric tube. For example, known processes for the production of diagonal thread webs have for their object to prevent the change of the thread angle, this being achieved by the fact that either the hose or tube is coated before being cut and is treated after having been cut or that, for the purpose of producing diagonal thread artificial leather, the helically cut fabric tube is initially coated, that is to say, is provided with a first coating of artificial leather mass, or that the diagonal thread fabric web produced by the helical cutting of a fabric tube is guided by means of pin-type chains or gripper chains through a coating arrangement and is only finished after it has received the coating effected thereon. In the latter case, a change in the thread angle is to be prevented by the use of pin-type and gripper chains in the arrangement for the initial coating. Furthermore, it is known in the production of diagonal thread insulating strip material to stretch a diagonal thread fabric in which the threads crossone another at right angles by means of a stretching process before a dressing operation or varnish impregnation until theretis obtained an intersection of the threads at an acute angle which is suitable for the actual purpose of use, and then to cut the fabric in ribbonlike strips. In this case, it is also a question of making 1 an existing thread angle more acute with a view to a special purpose of use.

In contrast thereto, the objectof the present invention is to treat a fabric so that, with a fabric web having inclined threads, the thread angle which has resulted from the helical cutting up of the tube and which is generally in the region of 45 and which during the treatment of the diagonal thread fabric web by singeing, bleaching, dressing or the like, has become more acute because of the tension exerted on the fabric web, is corrected again in the sense that the thread angle becomes more obtuse.

According to the invention, the problem of treating diagonal thread fabric webs in this sense is solved by the fact that the fabric web is produced by first helical cutting of a fabric tube or hose, then the obtained web is improved by singeing, bleaching, dressing or the like and the web which is thereby stretched in length and thus has an acute thread angle, is untensioned and enters a width-stretching device so that the thread angle becomes more obtuse due to the length supplied in excess asthe lead is being taken up.

By means of the process, it is possible for example, to

achieve the result that the thread angle, which after the helical cutting of the fabric tube amounted to 45, and

' which has become an angle'of 2530 due to the stretching of the fabric web resulting from the improved treatment, is stretched to 75-80" due to the fabric web being treated in a width-stretching device or tenter to which the fabric web is overfed in untensioned condition. The

length of fabric introduced by the lead in the tenter is evened out as soon as the diagonal thread fabric web has been brought to the desired width in the tenter, the inlet path of which extends divergently. The amount of ,overfeed is adjusted according to the desired'final width fabric web with'a thread angle of less than 45 Fig. 2 is a similar view showing the fabric web with a thread angle of 45,

Fig. 3 is atop plan .view diagrammatically showing the treatment of the fabric,

Fig. 4 is a side view of Fig. 3, and

Fig. 5 is a diagrammatic view showing the fabric stretched and unstretched.

The thread angle produced during the helical cutting of the fabric tube or hose is adjusted according to the width of the tube or hose desired and according to the desired thread angle of the latter.

For example, if a thread angle F of 45 has been produced during the cutting of the fabric tube, as indicated in the diagonal thread fabric web according to Fig. 2. then the improving treatment will make the thread angle more acute, for example, it will'assume an angle F according to Fig. 1. By the treatment of the fabric web in the width-stretching device, the acute thread angle F can be made into a more obtuse thread angle again, for example it can again assume a thread angle F (Fig. 2) of 45 or an even more obtuse angle.

Referring now to Figs. 3 and 4, there is illustrated in diagrammatic form the entire process of cutting the tube of the thread as indicated by the angle 90 at the beginning of the distortion zone and ending at approximately at the end of the distortion zone, just before the' fabric enters the treatment tank or vat 9. The final distortion of the angle reaches approximately 60 as: indicated in the zone 17 and the fabric then passes between two treatment rollers 10 to create a shrinking of the fabric at 11. The fabric then undergoes a width-. wise stretching at 12 which changes the angleto approximately 75 and the fabric then enters a drying chamber or room 13 where the angle of the thread is re. Finally the fabric is wound on a roller stored to 14 as the finished product.

The various angles indicated on the limitations.

2,928,160- I Patented Mar. 15, 1960 drawing are of course approximate and they can vary in rather widc- I claim as my invention:

1. Process for making a bias web, the warp threads andthe weft threads of which each have an angle *of approximately 45 to the edge of the web from a oven fabric tube, comprising cutting the untreated tube which has the threads parallel to and at right "angles to the? axis of the tube at an angle of approximately 45 relative to the edge of the cut flat web, treating the fiat web whereby a tension is produced in the webinfthe lqngitlu; dinal direction thereof and thereby a stretchingjof' thef web so that the thread angle at the edge thereoffbecomes acute and the width of the web diminishes, and stretching the web as to its width wherebythe thread angleis made more obtuse and the Width of the web'is increased.

2; Process for making a bias web, the warp threads and the weft threads of which each have an'jangle'ofi 1 approximately 45 to the edge of the web from awoven fabric tube comprising cutting the untreated tubewhich has the threads parallel to and at right angles to the axis" of the tube at an angle of approximately 45" relatiye to the edge of the cut fiat web, fluid treating the'fiat web whereby a tension is produced'in'the web in the longitudinal direction thereof and thereby a stretching of the Web so that the thread angle at the edge" thereof becomes acute and the width of the Web diminishes, and stretching the web as to its width whereby the thread angle is made more obtuse and the'width of the web is increased.

3. Process for making a bias web,vthe warp threads.

and the weft threads of which each have an angle of approximately 45 to the edge of the web from"a"woveli tube, comprising cutting the untreated tube which has the threads parallel to and at right angles to the axis of the tube at an angle of approximately 45 relative to the cut edge of the flat web, treating the flat'web whereby a tension is produced in the web in the longitudinal direction thereof, said tension resulting in a stretching of the Web so that the thread angle at the'edge thereof becomes more acute and the width of the web diminishes, and finally subjecting the stretched web to successive transverse folds and stretching the folded web asto its width simultaneously consuming the folds, whereby the thread angle is made more obtuse and the width of the web is increased.

References Cited in the file of this patent UNITED STATES PATENTS France Mar. 17, 19 25 

